public void TestCloseMiss() { Assert.IsFalse( Line2Disc2Collider.FindContacts( new Vector2(-1.0f, 2.1f), Vector2.UnitX, 2.0f ).HasContact ); }
public void TestLineThroughCenter() { LineContacts contacts = Line2Disc2Collider.FindContacts( new Vector2(-3.0f, 0.0f), Vector2.UnitX, 2.0f ); Assert.That( contacts.EntryTime, Is.EqualTo(1.0f).Within(Specifications.MaximumDeviation).Ulps ); Assert.That( contacts.ExitTime, Is.EqualTo(5.0f).Within(Specifications.MaximumDeviation).Ulps ); }
public void TestCircleWithAbsolutePosition() { Vector2 unitDiagonal = Vector2.Normalize(Vector2.One); LineContacts contacts = Line2Disc2Collider.FindContacts( Vector2.Zero, unitDiagonal, unitDiagonal * 5.0f, 2.0f ); Assert.That( contacts.EntryTime, Is.EqualTo(3.0f).Within(Specifications.MaximumDeviation).Ulps ); Assert.That( contacts.ExitTime, Is.EqualTo(7.0f).Within(Specifications.MaximumDeviation).Ulps ); }
/// <summary>Determines where a ray will hit a disc, if at all</summary> /// <param name="rayStart">Starting point of the ray</param> /// <param name="rayDirection">Direction into which the ray extends</param> /// <param name="discCenter">Center of the disc</param> /// <param name="discRadius">Radius of the disc</param> /// <returns>The intersection points between the ray and the box, if any</returns> public static LineContacts FindContacts( Vector2 rayStart, Vector2 rayDirection, Vector2 discCenter, float discRadius ) { LineContacts contacts = Line2Disc2Collider.FindContacts( rayStart, rayDirection, discCenter, discRadius ); // If the line has entered the box before the reference point, this means // that the ray starts within the box, thus, its first contact occurs immediately if (!float.IsNaN(contacts.EntryTime)) { if (contacts.ExitTime < 0.0f) // Entry & exit before the ray's beginning? { return(LineContacts.None); } else if (contacts.EntryTime < 0.0f) // Only entry before ray's beginning? { contacts.EntryTime = 0.0f; } } return(contacts); }